3 answers
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Growth models:
F(x) = 500(0.95)^30
F(x) = 12(3)^5
F(x) = 17(2)^3
Decay models:
F(x) = 124(0.32)^8
F(x) = 24(0.5)^5
F(x) = 6(1.8)^2